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Benzyl (1R,2S,3S,4S,7R,9S,10S,12R,15R,16S)-4-acetyloxy-15-hydroxy-10,14,20,20-tetramethyl-11,18-dioxo-9,12-bis(2,2,2-trichloroethoxycarbonyloxy)-6,17,19-trioxapentacyclo[11.6.1.01,16.03,10.04,7]icos-13-ene-2-carboxylate


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